METHOD OF OPEN-UNDERGROUND DEVELOPMENT OF THICK SINGLE STEEPLY INCLINED COAL SEAM Russian patent published in 2015 - IPC E21C41/00 

FIELD: mining operations.

SUBSTANCE: invention relates to mining operations, in particular to open-underground development of thick steeply inclined coal seams with horizontal layers using the mobile means of mechanisation applied in underground mining. The method comprises the construction of a horizontal working site away from the exit of the coal seam, mounting on it of the mechanisation means, carrying out opening inclined working to the level of the underlying layer and construction of the layer chamber in a layer with mobile mechanisation means, coal extraction with these mechanisation means away from the working site through horizontal excavation chambers on both sides of the layer chamber, the deepening of the opening inclined working leaving the proportioned interchamber pillars between the layers, and the supply of chipped coal on the excavation chambers and the opening inclined working to the temporary warehouse, formed on the working site. At that the working site is constructed on the day surface, the output of the seam is taken as the output of the seam under the sediments, the projection of the axis of the opening inclined working is oriented on the plan at an acute angle (γ) to the line of the seam extension, depending on the angle of its occurrence (α) and permissible angle (β) of the longitudinal tilt of the used means of mechanisation, determined from the mathematical relationship, and the mouth of the opening inclined working is located at a distance from the seam, measured along the line of the horizon, equal to 3 to 5 lengths of the greatest of the used mobile mechanisation means.

EFFECT: increasing the efficiency of the development of a thick single powerful steeply inclined coal seam.

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